The install class seems to be designed to make the logic decision on how
to install r10k based on whether or not PE is being used. However, some
of that logic had leaked out into the init.pp file, and the install/*.pp
classes were redundant in many ways. This commit simplifies and reduces
the apparent complexity of the class without changing the functional
configuration.

There are currently bugs in r10k 1.x which make using 0.x desireable
in certain circumstances. However, 0.x requires make and gcc.
Conditionally include those classes if necessary due to 0.x r10k version
usage.

When 1.x is just as good or better than 0.x, we can stop supporting
0.x and remove these bits.

Conflicts:
	manifests/install.pp

Environment logic to set parameters can (and should) be located in the
params.pp file, rather than spread throughout the codebase. Especially
if in params.pp we are already performing a given conditional to set
other variables.

Move environemnt logic from config.pp to params.pp

Clean up install class

Prior to this commit dynamic scoping was pulling the remote

Prior to this commit we did some funky stuff in the erb template

```puppet
err: Could not parse for environment production: Syntax error at 'else'; expected '}' at /opt/puppet/share/puppet/modules/r10k/manifests/config.pp:64
err: Try 'puppet help parser validate' for usage

```

Prior to this commit we required a version of standard lib that did not work
with PE3